The Senate Intelligence Committee has quietly approved a plan to step up both public and internal government oversight of the use of armed drones to kill suspected militants overseas, including American citizens.

The committee voted in closed session earlier this week to approve legislative language that would require U.S. spy agencies to make public statistics on how many people were killed or injured in missile strikes launched from U.S.-operated drones.

The committee also approved language intended to bolster scrutiny of secret spy agency deliberations over decisions about targeting U.S. citizens or residents for lethal drone strikes overseas.

The Obama administration has been under heavy pressure from foreign governments, theÂ United NationsÂ and human rights groups to be more transparent and rigorous in accounting for the civilian casualties caused by drone strikes.